• 1
    Arnett FC, Edworthy SM, Bloch DA, McShane DJ, Fries JF, Cooper NS, et al. The American Rheumatism Association 1987 revised criteria for the classification of rheumatoid arthritis. Arthritis Rheum 1988; 31: 31524.
  • 2
    Larsen A, Dale K, Eek M. Radiographic evaluation of rheumatoid arthritis and related conditions by standard reference films. Acta Radiol 1977; 18: 48191.
  • 3
    Symmons DPM, Barrett EM, Bankhead CR, Chakravarty K, Scott DGI, Silman AJ. The incidence of rheumatoid arthritis in the United Kingdom: results from the Norfolk Arthritis Register. Br J Rheumatol 1994; 33: 7359.
  • 4
    Dugowson CE, Koepsell TD, Voigt LF, Bley L, Nelson JL, Daling JR. Rheumatoid arthritis in women: incidence rates in Group Health Cooperative, Seattle, Washington, 1987–1989. Arthritis Rheum 1991; 34: 15027.
  • 5
    Chan K-WA, Felson DT, Yood RA, Walker AM. Incidence of rheumatoid arthritis in central Massachusetts. Arthritis Rheum 1993; 36: 16916.
  • 6
    Guillemin F, Briançon S, Klein J-M, Sauleau E, Pourel J. Low incidence of rheumatoid arthritis in France. Scand J Rheumatol 1994; 24: 2648.
  • 7
    Kaipianen-Seppänen O, Aho H, Isomaki H, Laakso M. Shift in the incidence of rheumatoid arthritis toward elderly patients in Finland during 1975–1990. Clin Exp Rheumatol 1996; 14: 53742.
  • 8
    Chan K-WA, Felson DT, Yood RA, Walker AM. The lag time between the onset of symptoms and diagnosis of rheumatoid arthritis. Arthritis Rheum 1994; 37: 81420.
  • 9
    MacGregor AJ, Silman AJ. A re-appraisal of the measurement of disease occurrence in rheumatoid arthritis. J Rheumatol 1992; 19: 11635.
  • 10
    MacGregor AJ, Bamber S, Silman AJ. A comparison of the performance of different methods of disease classification in rheumatoid arthritis: results of an analysis from a nationwide twin study. J Rheumatol 1994; 21: 14206.